Apparatus for making soluble coffee and other products



H. ANHALTZER.

APPARATUS FOR MAKING SOLUBLE COFFEE AND OTHER PRODUCTS.

APPLICATION FILED APR. 28, I919.

1 58,048. Patented NOV- 9, 1920.

F I 5-1- FIGfgsiiEETS-SHEET I.

WITNESSES INVENTOR 7% MEI H. ANHALTZER. APPARATUS FOR MAKING SOLUBLE COFFEE AND OTHER PRODUCTS. APPLICATION FILED APR- 28, I919.

1 ,35 8 ,048. Patented Nov. 9, 1920.

I 2 SHEETSSHEET 2.

FIE.5.

WITNESSES INVENTOR tubes, but any number, either one or more,

. are shownofinvertedconical form, and at.

the apex of ithe inner bottom is a small opening towhich is connected a tube 22 which 'exten'c'ls through the lower; bottom and then turns upwardly. and projects throughthe hoo'd14 on the outside of the .cylindrical portion 13;] The points where upwardly to 'a considerable distance and then turns"downwardly and extends through I thehoodi14,'and has'an open end projectnieticallyysealed;

this tubepasses through the" lower bot-tom 20,,and the hood l-l are hermetically sealed by'js'older' .or other suitable means. Con.- nectedio the'end' of tubep2-2 is a siphon tube 2 3',Ypreferably of glass. which projects ing into th'e'boiler 1, the opening through the -l1oo'd;'--1 -{l at this ,fpoint also being her- Titliin' ,he cylin'dricalperson 13 is c lindrical'i cage or basket 25 formed preferablyof. WlffilbllCOl of perforated metal 7 for containingithe solid substance to be subffabricjr26"andgthen placed inside of the c, .jected toftlie extracting operation. In the 1 case-of coffee, the ground coffee will be put into ,"a -ba'g' of cotton, silk, linen or other basket 25;" This" .basket extends upwardly nearly to the lower edges of the vapor space. 29 therebetw'een, which space has coni openings 17. I

Theftop section or'condenser 3 is 'shown of conical form provided with an outer wall 27' and an inner. wall 28 forming a water .nected thereto a water inlet 30 near its bottom and water outlets 31 near its top, so that cold water can be circulated therethrough to keep the same cool. wall 28 is preferably extended downwardly somewhat below the flange 10 to enter'the upper end of the cylindrical vessel 13 but not sufficiently far to obstruct the vapor openings 17. as shown at 32. This downwardly projecting portion 32 is preferablyof smaller diameter than the vessel 13 and is surrounded by a mug 33 of suitable heat insulating material. whlch, together with {the gasket 11 prevents the heat inthe'lower portion of the apparatus from beingconr municated to the condenser.

Inside of the condenser are a number of battles for preventing the vapors which come up throughthe vapor tubes from attempting to flow straight across and thus oppose each other, and for directing said vapors upwardly into contact with the inner cool wall The inner 7 of the condenser. As shown the baflies comprise three wings 34 secured to the inner wall of the condenser and roject downwardly below the same to su stantially the lower edge of the vapor openings 17 The 70.

number of the baflies obviously will vary with the number of vapor openings. Preferably these bafiles will also be-cooled and are shown as formed with double walls leaving therebetween spaces 35, which are open to the water space 29 in the condenser, so that the water in the space 29 also enters the hollow battles and keeps the latter. cool.

Projecting downwardly through the apex of the condenser andhernretically sealed to both the inner and outer walls thereof is a tube 36 to whose upper end is connected :1.

funnel 37, preferably closed by a cover 38.

In-said tube 36 immediately below the fun- I nelis a cut off cock 39 of any suitable construction, by means of which the opening through the tube can be opened and closed. Preferably also atap will be provided through the hood 14, this being shown in the form of tube 40 extending through the" hood and hermetically sealed therein,

.and provided outside of the hood with a v The boiler 1 is also shown as provided with a draw-off fau- -cet 42 connected at its bottom, through 'which the solution in said boiler. can be suitable cut-off cock 41.

drawn ofi' whenever desired. The operation of the apparatus is as follows: 4 1

The boiler and extracting chamber 2 are clamped togetherby means of the hinged bolts 6. and nntsT, and the substance to be treated is placed within the'perforated or reticulated basket 15, preferably in a fabric bag or casing as hereinbefore described. The condenser is then placed on top of the apparatus and clamped in position. ater g,

connections are established with the inlet 30 and outlet 31 to said condenser, and all of the cocks except the cocks 39 and 41 are closed. The necessary volume of water (when extracting coffee) is heated in any suitable way, and when boiling is "poured in'tothe funnel 37 and runs down through 15 the tube 36, permeates the coffee or other substance in the basket 25, taking up partially-the soluble constituents therein. The water collects inthe 'cylindrical vessel 13 as a brown colored liquid until it reaches the level of the uppermost bend of the siphon -tube 23 when it will start to run down through said tube, thus creating a vacuum in the cylindrical chamber which draws out practically all of the liquid'solution from said cylindrical chamber and conducts the same to the bottom. chamber or boiler 1 in the well understood action of a siphon. The volume of water or other solvent which is supplied is so chosen as to be suflicient after the solution has been siphonedoutonce, to fill the cylindrical vessel a ain at least half full. For extracting 00 ee a volume of water two and a half times the weight of the coffee is sufiicient. The air which is displaced by pouring the boiling water through the funnel is allowed to escape through the tube 40 so that it is evacuated and prevents it from expelling the water upwardly'through the tube 36 while the water tween adjacent bafile walls 34 and are directed by these upwardly into contact with y h before referred to. i

the inner wall of the condenser 3. The contact of the vapors with the cool baflie walls and condenser walls -condenses said vapors into 'a liquid which flows down into the cylindrical chamber 13, collecting therein and extracting further soluble ingredients from the substance therein until the liquid again reaches the level of the upper end of the siphon 23, when said accumulated liquid is again siphoned out and returned to the boiler 1. This operation is continued repeatedly and takes place automatically until the liquid flowing down through the siphon tube 23 is colorless, or nearly so, when the extracting operation (in the case of cofiee) is complete. Since the siphon tube is formed of glass the progress of be easily observed. p

When the extraction is completed the liq: uid is drawn from the boiler 1 through fau- -cet 42, and will then be subjected to further treatment depending upon the character of the extract to be formed. In the case of soluble coffee said extract is conducted. fromthis boiler'to a suitable evaporating apparatus, for reducing it to the form of a dry solid. This evaporating apparatus obviously can be of various characters, prefer'-.

ably as illustrated'and described in my former application Serial No. 261;898, herein- The entire apparatus described is air and water tight so that the aroma of the coffee or other volatile ingredients which are extracted cannot escape, and in the case of coffee it will always retain itsfresh taste.

The extracting liquid need not/be water, but can be alcohol, ether,'chloroform or the like, depending upon the substance to be treated. When extracting coffee it may be found desirable to add some alcohol after a certain length of treatmentwith the hot water. Ifalcohol is to be added, or if additional water is found necessary, it can be easily supplied during the operation of the 36, by opening the cock39; or it can be addthe extraction can of. a rubber tube 44.

ed by connecting a tube to the tap 40 through the hood of the extractor. Likewise any part or all of liquid solution can be withdrawn during the operation of the apparatus through the faucet 42 inthe bottom of the boiler.

Fig. 6 shows a simple form of apparatus in which the preliminary boiling of the substance can be effected. This apparatus comprises a cylindrical vessel 13* arranged to receive the basket 25 with the contained substance, and closed at its top by a simple condenser 3, having hollow walls to which water connections 30 and 31 are made to cool said condenser; or the condenser of Fig. 2 may be applied to the vessel 13*. The vessel 13 is provided near its bottom with a draw-off faucet 42*. In the use of this apparatus the substance to be treated is placed in the basket 25, and placed in the vessel 13 together with a suitable liquid, such as water. The top 3 is then applied, the water circulation established to the said top, and heat applied to the bottom of said vessel, which can be conveniently done by means of a Bunsen burner 43. The water will be added in a calculated volume sufficient to cover the material being treated. The material is then boiled, say for about-fifteen minutes,

the generated steam being condensed by the After being treated the right length of time the liquid extract is transferred to the boiler l of the apparatus shown in Fig. 2. Preferably this transfer is made without permitting the liquid extract coming into contact with the a'ir, such as" connecting thejfaucet 42 to tap 40 of the main apparatus by means The coffee or other material and the basket 25 are then removed from vessel 13 and placed in,the vessel 13 of the main apparatus. The top 3 is clamped into ,position and the material then subjected tofurther extraction in the main apparatus inthe manner already described. By subjecting the coffee to the preliminary v(boiling in the apparatus 13 the operations I f I in the main apparatus need not be repeated so often.

Various modifications obviously can be made in the form of the apparatus and the arrangement of the three essential parts, I

relative to each other. They need not necessarily be built up in a single unit as illus trated. Obviously also a number of. individual extractors and condensers can be connected to a single boiler.

[I claim: f "1. An apparatus for'the purpose specified comprising, in combination, a vessel having 'alchamber for containing the material to be the liquid from the upper chamber and conducting it to the lower chamber, and a condenser arranged to receive the vapors from the second named chamber, condense the same and direct the condensation back to the first named chamber.

2. ,An apparatus for the purpose specified comprising, in combination, a vessel having a chamber for containing the material to be treated, together with a liquid, a chamber to which heat can be applied, located below the first named chamber, a siphon connecting said chamber forperiodically drawing the liquid from the upper chamber and conducting itto the lower chamber, a closure for the top of the first named chamber, means to cool said closure, and means for directing the vapors from the second named chamber to said closure, whereby said vapors are condensed and the condensation directed into the first named chamber.

3. An apparatus for the purpose specified comprising, in combination, a vesselhaving a chamber for containing the material to be treated, together with a liquid, a second chamber to which heat can be applied, located below the first named chamber, a siphon connecting said chamber to periodi cally draw the liquid from the upper chamber and conduct the same to the lower chamber,'a condenser closing the top of the first named chamber, vapor fluescleading from the lower chamber to the top of the upper chamber underneath said condenser, and

treated, together with a liquid, a second a chamber for containing the material to be chamber to which heat can be applied, lo- 1 cated below the first named chamber, a

siphon connecting said chamber to periodically draw the liquid from the upper chamber and conduct the same to the lower chamber, vapor'fiues leading from the lower chamber to the top of the upper chamber underneath said condenser, bafl'les arranged to direct the vapors from said vapor flues into contact with said condenser, and means to cool said battles.

5. An apparatus for the purpose specified comprising, in combination, a vessel having a chamber to contain the substance to be to which heat can be applied located below the first named chamber, siphoning 'means for withdrawing liquid -from the upper chamber and conducting it to the lower chamber, vapor flues leading from the lower chamber and entering the upper chamber treated, together with a liquid,- aichamber near its top, a closure for the top of the up per chamber provided with hollow walls, and means to circulate a cooling medium throu h said hollow walls.

6. n apparatus for the purpose specified comprising, in combination, a vessel having a chamber to contain the substance to be treated, together with aliquid, a chamber cooled closure.

7 An apparatus for the purpose specified comprising, in combination, a vessel having a chamber to contain the substance to be treated, together with a liquid, a chamber to which heat can be applied located below the-first named chamber, siphoning means for withdrawing liquid from the upper chamber and conducting it to the lower chamber, vapor flues leading from the lower chamber and entering the upper chamber near itsctop, a closure for the top of the upper chamber provided with hollow walls,

'70 to which heat can be applied located below means to c rculate a cooling medium cgthrough sald hollow walls, and bafiles ar-v ranged in said closure and projecting down- ;wardly below the openings of the vapor flues to direct the vapors upwardly against said cooled closure, said baflies being hollow and having'their, interiors connected'to the hollow walls of the closure to thereby receive the cooled medium.

In testimony whereof, I have hereunto set my hand. 4

- HENRY ANHALTZER. Witness: j a

TRILL.

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